Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong tac » cong ty
can tu » van tu, han tu, con tu
ban tu » van tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sang) or (chieu sach)) - canh tranh cua nhung cong tac ((can tu) OR (ban tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (chieu sach)) - canh tranh cua nhung cong tac ((can tu) OR (ban tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) or (chieu sach)) - canh tranh cua nhung cong tac ((can tu) OR (ban tu))".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (chieu sach)) - canh tranh cua nhung cong tac ((can tu) OR (ban tu))*.